reh321

As I age, carrying a DSLR is becoming a problem, so {since I already have it} I have started carrying my Pentax "Q".

I have discovered that, with its so-called 1/1.7" sensor, it is somewhat "picky" so I've been auditioning lenses to use with it.

Recently, I took this with a "Nikon Lens Series E" 75-150mm.

Since my "Q" has a crop factor of 3 relative to "APS-C", that is basically like using a 300mm + 1,4X TC on my Pentax "KP",

so I'll definitely have to audition this lens more.

I have always been impressed by the focusing available to users of Nikon DSLR.

My understanding has always been that the company used a separate processor to deliver fast focusing to D5 and D500 users.

Are there any other DSLRs which have that system?

How do better {more expensive} Nikon MILCs provide fast focusing?

I have been a member of the Pentax Forums since 2014,

back when I was actually a Canon user, but I thought I should

join here and become familiar with Nikon also.